Pre-oxidization of SiC on interfacial structure and mechanical properties of SiCp/Al composites prepared by vacuum-pressure infiltration

Effect of Ti Doping on the Microstructure and Properties of SiCp/Al Composites by Pressureless Infiltration

“…These solid whiskers impede the infiltration process, leading to a reduction in material density. On the other hand, in the TC sample, the TiC component remains unchanged and is distributed within the SiC framework; however, some of it transforms TiO2, compounds of which subsequently participate in Reactions ( 6) and (7), resulting in the formation of AlTi and Al2Ti phases that coexist with the aluminum matrix. Notably, incorporating TiC raw materials into the SiC framework compositionally hinders the generation of the Al3Ti phase at interfaces.…”

“…These attributes make them ideally suited to meet the demanding performance requirements of advanced electronic packaging materials [5,6]. Several processes have been developed for the fabrication of SiC p /Al composites, mainly including pressure [7] or pressureless melt infiltration [8], extrusion casting [9], and powder metallurgy [10,11]. Among these, pressureless infiltration is an economical and efficient near-net-shape forming technique that combines material processing and part formation.…”

Improving thermal conductivity of AlSiC composites by post-oxidization of reaction-bonded silicon carbide preforms

“…The properties of AlSiC composites are in uenced by several factors, such as the interface microstructure, the size distribution and the volume fraction of the reinforcement materials, and the manufacturing methods 14,15 . The SiC preform produced by reaction sintering (RS) in oxygen free conditions is commonly referred to as reaction-bonded silicon carbide (RBSiC) preform 16,17 .…”

“…SiC preforms can also be obtained through conventional sintering (CS) in air 22,23 . During this process, SiO 2 is generated on the surface of SiC particles due to surface oxidization 15,24 . Researchers have generally focused on the mechanical performance of AlSiC composites affected by SiO 2 layer, but they have rarely paid attention to the thermal properties induced by silica 24 .…”

“…Furthermore, composites with high volume content could be produced using SiC powders with bimodal size distribution, with average particle sizes of 170 μm and 16 μm, resulting in an AlSiC composite with a TC of 220 W/m•k 36 . Song and co-authors 15 recently prepared AlSiC composites with a high volume fraction of ceramic phase using SiC mixtures with a tri-modal size distribution (with an average particle size of 90 μm, 60 μm, and 10 μm). The study aimed to investigate the in uence of pre-oxidation of SiC particles on the mechanical properties of the composites.…”